Come Fly with me: Yoko Ono invites you to enter a caption competition

Yoko Ono – who has a
new show at the Serpentine Gallery in London – wants to know what this fly is doing. It's a still from her filmwork Fly, which she made with John Lennon in 1970. The writer of Ono's favourite caption will receive a signed copy of her book Grapefruit. You've got until 7pm on Thursday 21 June to enter your caption into the comment thread below